METRIBUZIN
Chemical Identification | |
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CAS # | 21087-64-9 |
Formula |
C₈H₁₄N₄OS |
Synonyms |
4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one |
Physical Properties | |||
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Physical description | Colorless, crystalline solid. | ||
Boiling point | Molecular weight | 214.3 | |
Freezing point/melting point | 257°F | Vapor pressure | 0.0000004 mmHg |
Flash point | Vapor density | ||
Specific gravity | 1.31 | Ionization potential | |
Lower explosive limit (LEL) | Upper explosive limit (UEL) | ||
NFPA health rating | NFPA fire rating | ||
NFPA reactivity rating | NFPA special instruction | ||
Vapor hazard ratio (VHR) | |||
Historical exceedance percentage | |||
Target organs |
Monitoring Methods Used by OSHA | ||||||
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Analyte code (IMIS no.) | A175 | |||||
Sampling group | ||||||
Sampler/Sampling media | OSHA versatile sampler (OVS-2) - 13 mm XAD-2 tube (270/140 mg) with GFF enclosed [SKC 226-30-16] | |||||
Sampling time* | ||||||
Sampling volume (TWA)* | 240 L |
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Sampling flow rate (TWA)* | 1 L/min |
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Sampling volume (STEL/Peak/C)* | ||||||
Sampling flow rate (STEL/Peak/C)* | ||||||
Analytical method instruments | GC-FPD | |||||
Method reference | OSHA PV2044 (partially validated) | |||||
Notes |
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Special requirements |
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* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.
Wipe Method | |
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Sampler/Sampling media |
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Bulk Method |
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On-Site Screening Techniques | ||||||
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Device | ||||||
Model/Type | ||||||
Sampling information (see manufacturer instructions) |
Exposure Limits | |||||||
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OSHA PEL
8-hour TWA (ST) STEL (C) Ceiling Peak |
NIOSH REL
Up to 10-hour TWA (ST) STEL (C) Ceiling |
ACGIH TLV©
8-hour TWA (ST) STEL (C) Ceiling |
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PEL-TWA |
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REL-TWA |
5 mg/m³ |
TLV-TWA |
5 mg/m³ [1981] |
PEL-TWA |
5 mg/m³ |
PEL-STEL |
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REL-STEL |
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TLV-STEL |
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PEL-STEL |
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PEL-C |
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REL-C |
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TLV-C |
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PEL-C |
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Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Skin notation |
N |
Notes:
Not established |
Notes:
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Notes:
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Notes:
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Health factors: See NIH-NLM PubChem. | IDLH | ||||||
Carcinogenic classifications: TLV-A4, EPA-D |
Notes:
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AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
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Additional Resources and Literature References |
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NOAA: CAMEO Chemicals - Metribuzin NIOSH: Pocket Guide to Chemical Hazards - Metribuzin Literature References
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Last Updated Date : 01/05/2021